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arXiv 0907.5563astro-ph.IMhep-ex
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MUPAGE:一个用于中微子望远镜的基于参量公式的快大气μ子GEnerator

MUPAGE: a fast atmospheric MUon GEnerator for neutrino telescopes based on PArametric formulas

G. Carminati, M. Bazzotti, S. Biagi, S. Cecchini, T. Chiarusi, A. Margiotta, M. Sioli, M. Spurio

摘要:

中微子望远镜为观测高能天体物理学提供了新的机会。在这些探测器中,来自大气中初级宇宙射线相互作用的大气μ子起着重要作用。它们为校准和测试重建算法提供了最丰富的事件源。另一方面,它们是主要的背景来源。在大体积中微子望远镜中模拟统计上显著数量的μ子需要很大的计算时间。目前有一些参数化方法,但它们没有明确考虑到μ子在束中的到达。为了在水下/冰中中微子望远镜中产生单个和多个大气μ子事件,研制了一种快速蒙特卡罗发生器(MUPAGE)。该程序大大减少了大气μ子模拟的计算时间。事件运动学在用户定义的圆柱体的表面上产生,实际上围绕探测器体积。利用参数公式计算了不同深度和不同天顶距的μ子束通量、束中μ子的横向展宽和能谱。这些公式是根据一个特定的初级宇宙线通量模型得到的,并受到MACRO地下实验中μ子通量测量的约束。一些MUPAGE应用。

英文摘要:

Neutrino telescopes are opening new opportunities in observational high energy astrophysics. In these detectors, atmospheric muons from primary cosmic ray interactions in the atmosphere play an important role. They provide the most abundant source of events for calibration and for testing the reconstruction algorithms. On the other hand, they represent the major background source. The simulation of a statistically significant number of muons in large volume neutrino telescopes requires a big effort in terms of computing time. Some parameterizations are currently available, but they do not explicitly take into account the arrival of muons in bundles. A fast Monte Carlo generator (MUPAGE) was developed to generate single and multiple atmospheric muon events in underwater/ice neutrino telescopes. The code reduces the computing time for the simulation of atmospheric muons significantly. The event kinematics is produced on the surface of a user-defined cylinder, virtually surrounding the detector volume. The flux of muon bundles at different depths and zenith angles, the lateral spread and the energy spectrum of the muons in the bundles are based on parametric formulas. These formulas were obtained according to a specific primary cosmic ray flux model and constrained by the measurements of the muon flux in the MACRO underground experiment. Some MUPAGE applications are presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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